Requires states to study and report the real costs hospitals incur for maternity, labor, and delivery services and to compare those costs with insurer payments. Expands Medicaid and CHIP maternal coverage (including 12 months postpartum), creates an optional coordinated “maternity health home” model, supports screening for perinatal mood disorders, and advances coverage of doulas and certain maternal providers. Sets notice and public-reporting rules when hospitals close obstetric units, adds hospital labor-and-delivery data to cost reports, and funds tools and temporary federal staffing (Commissioned Corps) to help facilities facing urgent maternal care needs.